8 use std::collections::HashMap;
9 use std::sync::{Arc, Mutex};
10 use std::sync::atomic::{Ordering, AtomicBool};
11 use std::time::{Duration, Instant};
12 use std::net::SocketAddr;
14 use bitcoin_hashes::sha256d;
16 use bitcoin::blockdata::constants::genesis_block;
17 use bitcoin::network::constants::Network;
18 use bitcoin::network::message::NetworkMessage;
19 use bitcoin::network::message_blockdata::{GetHeadersMessage, Inventory, InvType};
20 use bitcoin::util::hash::BitcoinHash;
22 use printer::{Printer, Stat};
24 use datastore::{AddressState, Store, U64Setting, RegexSetting};
25 use timeout_stream::TimeoutStream;
27 use tokio::prelude::*;
28 use tokio::timer::Delay;
30 static mut HIGHEST_HEADER: Option<Box<Mutex<(sha256d::Hash, u64)>>> = None;
31 static mut HEADER_MAP: Option<Box<Mutex<HashMap<sha256d::Hash, u64>>>> = None;
32 static mut HEIGHT_MAP: Option<Box<Mutex<HashMap<u64, sha256d::Hash>>>> = None;
33 static mut DATA_STORE: Option<Box<Store>> = None;
34 static mut PRINTER: Option<Box<Printer>> = None;
35 pub static START_SHUTDOWN: AtomicBool = AtomicBool::new(false);
36 static SCANNING: AtomicBool = AtomicBool::new(false);
39 request: (u64, sha256d::Hash),
42 fail_reason: AddressState,
49 pub fn scan_node(scan_time: Instant, node: SocketAddr) {
50 if START_SHUTDOWN.load(Ordering::Relaxed) { return; }
51 let printer = unsafe { PRINTER.as_ref().unwrap() };
52 let store = unsafe { DATA_STORE.as_ref().unwrap() };
54 let peer_state = Arc::new(Mutex::new(PeerState {
60 fail_reason: AddressState::Timeout,
61 msg: (String::new(), false),
62 request: (0, Default::default()),
64 let final_peer_state = Arc::clone(&peer_state);
66 let peer = Delay::new(scan_time).then(move |_| {
67 printer.set_stat(Stat::NewConnection);
68 let timeout = store.get_u64(U64Setting::RunTimeout);
69 Peer::new(node.clone(), Duration::from_secs(timeout), printer)
71 tokio::spawn(peer.and_then(move |(mut write, read)| {
72 let requested_height = unsafe { HIGHEST_HEADER.as_ref().unwrap() }.lock().unwrap().1 - 1008;
73 let requested_block = unsafe { HEIGHT_MAP.as_ref().unwrap() }.lock().unwrap().get(&requested_height).unwrap().clone();
74 peer_state.lock().unwrap().request = (requested_height, requested_block);
76 TimeoutStream::new_timeout(read, scan_time + Duration::from_secs(store.get_u64(U64Setting::RunTimeout))).map_err(|_| { () }).for_each(move |msg| {
77 let mut state_lock = peer_state.lock().unwrap();
78 macro_rules! check_set_flag {
79 ($recvd_flag: ident, $msg: expr) => { {
80 if state_lock.$recvd_flag {
81 state_lock.fail_reason = AddressState::ProtocolViolation;
82 state_lock.msg = (format!("ProtocolViolation due to dup {}", $msg), true);
83 state_lock.$recvd_flag = false;
84 return future::err(());
86 state_lock.$recvd_flag = true;
89 state_lock.fail_reason = AddressState::TimeoutDuringRequest;
91 NetworkMessage::Version(ver) => {
92 if ver.start_height < 0 || ver.start_height as u64 > state_lock.request.0 + 1008*2 {
93 state_lock.fail_reason = AddressState::HighBlockCount;
94 return future::err(());
96 let safe_ua = ver.user_agent.replace(|c: char| !c.is_ascii() || c < ' ' || c > '~', "");
97 if (ver.start_height as u64) < state_lock.request.0 {
98 state_lock.msg = (format!("LowBlockCount ({} < {})", ver.start_height, state_lock.request.0), true);
99 state_lock.fail_reason = AddressState::LowBlockCount;
100 return future::err(());
102 let min_version = store.get_u64(U64Setting::MinProtocolVersion);
103 if (ver.version as u64) < min_version {
104 state_lock.msg = (format!("LowVersion ({} < {})", ver.version, min_version), true);
105 state_lock.fail_reason = AddressState::LowVersion;
106 return future::err(());
108 if ver.services & (1 | (1 << 10)) == 0 {
109 state_lock.msg = (format!("NotFullNode ({}: services {:x})", safe_ua, ver.services), true);
110 state_lock.fail_reason = AddressState::NotFullNode;
111 return future::err(());
113 if !store.get_regex(RegexSetting::SubverRegex).is_match(&ver.user_agent) {
114 state_lock.msg = (format!("BadVersion subver {}", safe_ua), true);
115 state_lock.fail_reason = AddressState::BadVersion;
116 return future::err(());
118 check_set_flag!(recvd_version, "version");
119 state_lock.node_services = ver.services;
120 state_lock.msg = (format!("to Good: {}", safe_ua), false);
121 if let Err(_) = write.try_send(NetworkMessage::Verack) {
122 return future::err(());
125 NetworkMessage::Verack => {
126 check_set_flag!(recvd_verack, "verack");
127 if let Err(_) = write.try_send(NetworkMessage::GetAddr) {
128 return future::err(());
131 NetworkMessage::Ping(v) => {
132 if let Err(_) = write.try_send(NetworkMessage::Pong(v)) {
133 return future::err(())
136 NetworkMessage::Addr(addrs) => {
137 if addrs.len() > 1000 {
138 state_lock.fail_reason = AddressState::ProtocolViolation;
139 state_lock.msg = (format!("ProtocolViolation due to oversized addr: {}", addrs.len()), true);
140 state_lock.recvd_addrs = false;
141 return future::err(());
143 if !state_lock.recvd_addrs {
144 if let Err(_) = write.try_send(NetworkMessage::GetData(vec![Inventory {
145 inv_type: InvType::WitnessBlock,
146 hash: state_lock.request.1,
148 return future::err(());
151 state_lock.recvd_addrs = true;
152 unsafe { DATA_STORE.as_ref().unwrap() }.add_fresh_nodes(&addrs);
154 NetworkMessage::Block(block) => {
155 if block.header.bitcoin_hash() != state_lock.request.1 ||
156 !block.check_merkle_root() || !block.check_witness_commitment() {
157 state_lock.fail_reason = AddressState::ProtocolViolation;
158 state_lock.msg = ("ProtocolViolation due to bad block".to_string(), true);
159 return future::err(());
161 check_set_flag!(recvd_block, "block");
169 }).then(move |_: Result<(), ()>| {
170 let printer = unsafe { PRINTER.as_ref().unwrap() };
171 let store = unsafe { DATA_STORE.as_ref().unwrap() };
172 printer.set_stat(Stat::ConnectionClosed);
174 let state_lock = final_peer_state.lock().unwrap();
175 if state_lock.recvd_version && state_lock.recvd_verack &&
176 state_lock.recvd_addrs && state_lock.recvd_block {
177 let old_state = store.set_node_state(node, AddressState::Good, state_lock.node_services);
178 if old_state != AddressState::Good && state_lock.msg.0 != "" {
179 printer.add_line(format!("Updating {} from {} to {}", node, old_state.to_str(), &state_lock.msg.0), state_lock.msg.1);
182 assert!(state_lock.fail_reason != AddressState::Good);
183 let old_state = store.set_node_state(node, state_lock.fail_reason, 0);
184 if old_state != state_lock.fail_reason && state_lock.msg.0 != "" && state_lock.msg.1 {
185 printer.add_line(format!("Updating {} from {} to {}", node, old_state.to_str(), &state_lock.msg.0), state_lock.msg.1);
193 tokio::spawn(future::lazy(|| {
194 let store = unsafe { DATA_STORE.as_ref().unwrap() };
195 let mut scan_nodes = store.get_next_scan_nodes();
196 let per_iter_time = Duration::from_millis(1000 / store.get_u64(U64Setting::ConnsPerSec));
197 let mut iter_time = Instant::now();
199 for node in scan_nodes.drain(..) {
200 scan_node(iter_time, node);
201 iter_time += per_iter_time;
203 Delay::new(iter_time).then(|_| {
204 let store = unsafe { DATA_STORE.as_ref().unwrap() };
205 store.save_data().then(|_| {
206 if !START_SHUTDOWN.load(Ordering::Relaxed) {
215 fn make_trusted_conn(trusted_sockaddr: SocketAddr) {
216 let printer = unsafe { PRINTER.as_ref().unwrap() };
217 let trusted_peer = Peer::new(trusted_sockaddr.clone(), Duration::from_secs(600), printer);
218 tokio::spawn(trusted_peer.and_then(move |(mut trusted_write, trusted_read)| {
219 printer.add_line("Connected to local peer".to_string(), false);
220 let mut starting_height = 0;
221 TimeoutStream::new_persistent(trusted_read, Duration::from_secs(600)).map_err(|_| { () }).for_each(move |msg| {
222 if START_SHUTDOWN.load(Ordering::Relaxed) {
223 return future::err(());
226 NetworkMessage::Version(ver) => {
227 if let Err(_) = trusted_write.try_send(NetworkMessage::Verack) {
228 return future::err(())
230 starting_height = ver.start_height;
232 NetworkMessage::Verack => {
233 if let Err(_) = trusted_write.try_send(NetworkMessage::SendHeaders) {
234 return future::err(());
236 if let Err(_) = trusted_write.try_send(NetworkMessage::GetHeaders(GetHeadersMessage {
238 locator_hashes: vec![unsafe { HIGHEST_HEADER.as_ref().unwrap() }.lock().unwrap().0.clone()],
239 stop_hash: Default::default(),
241 return future::err(());
243 if let Err(_) = trusted_write.try_send(NetworkMessage::GetAddr) {
244 return future::err(());
247 NetworkMessage::Addr(addrs) => {
248 unsafe { DATA_STORE.as_ref().unwrap() }.add_fresh_nodes(&addrs);
250 NetworkMessage::Headers(headers) => {
251 if headers.is_empty() {
252 return future::ok(());
254 let mut header_map = unsafe { HEADER_MAP.as_ref().unwrap() }.lock().unwrap();
255 let mut height_map = unsafe { HEIGHT_MAP.as_ref().unwrap() }.lock().unwrap();
256 if let Some(height) = header_map.get(&headers[0].prev_blockhash).cloned() {
257 for i in 0..headers.len() {
258 let hash = headers[i].bitcoin_hash();
259 if i < headers.len() - 1 && headers[i + 1].prev_blockhash != hash {
260 return future::err(());
262 header_map.insert(headers[i].bitcoin_hash(), height + 1 + (i as u64));
263 height_map.insert(height + 1 + (i as u64), headers[i].bitcoin_hash());
265 let top_height = height + headers.len() as u64;
266 *unsafe { HIGHEST_HEADER.as_ref().unwrap() }.lock().unwrap()
267 = (headers.last().unwrap().bitcoin_hash(), top_height);
268 printer.set_stat(printer::Stat::HeaderCount(top_height));
269 if top_height >= starting_height as u64 {
270 if !SCANNING.swap(true, Ordering::SeqCst) {
275 // Wat? Lets start again...
276 printer.add_line("Got unconnected headers message from local trusted peer".to_string(), true);
278 if let Err(_) = trusted_write.try_send(NetworkMessage::GetHeaders(GetHeadersMessage {
280 locator_hashes: vec![unsafe { HIGHEST_HEADER.as_ref().unwrap() }.lock().unwrap().0.clone()],
281 stop_hash: Default::default(),
283 return future::err(())
286 NetworkMessage::Ping(v) => {
287 if let Err(_) = trusted_write.try_send(NetworkMessage::Pong(v)) {
288 return future::err(())
297 }).then(move |_: Result<(), ()>| {
298 if !START_SHUTDOWN.load(Ordering::Relaxed) {
299 printer.add_line("Lost connection from trusted peer".to_string(), true);
300 make_trusted_conn(trusted_sockaddr);
307 if env::args().len() != 3 {
308 println!("USAGE: dnsseed-rust datastore localPeerAddress");
312 unsafe { HEADER_MAP = Some(Box::new(Mutex::new(HashMap::new()))) };
313 unsafe { HEIGHT_MAP = Some(Box::new(Mutex::new(HashMap::new()))) };
314 unsafe { HEADER_MAP.as_ref().unwrap() }.lock().unwrap().insert(genesis_block(Network::Bitcoin).bitcoin_hash(), 0);
315 unsafe { HEIGHT_MAP.as_ref().unwrap() }.lock().unwrap().insert(0, genesis_block(Network::Bitcoin).bitcoin_hash());
316 unsafe { HIGHEST_HEADER = Some(Box::new(Mutex::new((genesis_block(Network::Bitcoin).bitcoin_hash(), 0)))) };
318 tokio::run(future::lazy(|| {
319 let mut args = env::args();
321 let path = args.next().unwrap();
322 let addr = args.next().unwrap();
324 Store::new(path).and_then(move |store| {
325 unsafe { DATA_STORE = Some(Box::new(store)) };
326 let store = unsafe { DATA_STORE.as_ref().unwrap() };
327 unsafe { PRINTER = Some(Box::new(Printer::new(store))) };
329 let trusted_sockaddr: SocketAddr = addr.parse().unwrap();
330 make_trusted_conn(trusted_sockaddr);
332 reader::read(store, unsafe { PRINTER.as_ref().unwrap() });
340 tokio::run(future::lazy(|| {
341 unsafe { DATA_STORE.as_ref().unwrap() }.save_data()